Military History/brass shell identification

Wombat wrote at 2013-09-24 22:41:51
I served at Amberley with the Royal Australian Air Force with a squadron operating Canberra bombers in 1968. We operated two types of these aircraft with one type being fitted with Rolls Royce RA.3 Avon Mark one engines which only had provision for one starter cartridge...These engines developed 6,500 pounds of thrust and the other type being fitted with Rolls Royce RA.7 Avon Mark 109 engines which were rated higher at 7,500 pounds of thrust....these 109 engines had provision for three starter cartridges....this was the only way to start these jets on the ground and it was quite spectacular (and noisy) to see a double engine start sometimes.